<?php
namespace SimpleSAML\XHTML;
/**
* A minimalistic XHTML PHP based template system implemented for SimpleSAMLphp.
*
* @author Andreas Åkre Solberg, UNINETT AS. <andreas.solberg@uninett.no>
* @package SimpleSAMLphp
*/
use JaimePerez\TwigConfigurableI18n\Twig\Environment as Twig_Environment;
use JaimePerez\TwigConfigurableI18n\Twig\Extensions\Extension\I18n as Twig_Extensions_Extension_I18n;
class Template
{
/**
* The data associated with this template, accessible within the template itself.
*
* @var array
*/
public $data = array();
/**
* A translator instance configured to work with this template.
*
* @var \SimpleSAML\Locale\Translate
*/
private $translator;
/**
* The localization backend
*
* @var \SimpleSAML\Locale\Localization
*/
private $localization;
/**
* The configuration to use in this template.
*
* @var \SimpleSAML\Configuration
*/
private $configuration;
/**
* The file to load in this template.
*
* @var string
*/
private $template = 'default.php';
/**
* The twig environment.
*
* @var false|Twig_Environment
*/
private $twig;
/**
* The template name.
*
* @var string
*/
private $twig_template;
/**
* Current module, if any.
*/
private $module;
/**
* A template controller, if any.
*
* Used to intercept certain parts of the template handling, while keeping away unwanted/unexpected hooks. Set
* the 'theme.controller' configuration option to a class that implements the
* \SimpleSAML\XHTML\TemplateControllerInterface interface to use it.
*
* @var \SimpleSAML\XHTML\TemplateControllerInterface
*/
private $controller;
/**
* Whether we are using a non-default theme or not.
*
* If we are using a theme, this variable holds an array with two keys: "module" and "name", those being the name
* of the module and the name of the theme, respectively. If we are using the default theme, the variable defaults
* to false.
*
* @var bool|array
*/
private $theme;
/**
* Constructor
*
* @param \SimpleSAML\Configuration $configuration Configuration object
* @param string $template Which template file to load
* @param string|null $defaultDictionary The default dictionary where tags will come from.
*/
public function __construct(\SimpleSAML\Configuration $configuration, $template, $defaultDictionary = null)
{
$this->configuration = $configuration;
$this->template = $template;
// TODO: do not remove the slash from the beginning, change the templates instead!
$this->data['baseurlpath'] = ltrim($this->configuration->getBasePath(), '/');
// parse module and template name
list($this->module) = $this->findModuleAndTemplateName($template);
// parse config to find theme and module theme is in, if any
list($this->theme['module'], $this->theme['name']) = $this->findModuleAndTemplateName(
$this->configuration->getString('theme.use', 'default')
);
// initialize internationalization system
$this->translator = new \SimpleSAML\Locale\Translate($configuration, $defaultDictionary);
$this->localization = new \SimpleSAML\Locale\Localization($configuration);
// check if we need to attach a theme controller
$controller = $this->configuration->getString('theme.controller', false);
if ($controller && class_exists($controller) &&
in_array('\SimpleSAML\XHTML\TemplateControllerInterface', class_implements($controller))
) {
$this->controller = new $controller();
}
$this->twig = $this->setupTwig();
}
/**
* Normalize the name of the template to one of the possible alternatives.
*
* @param string $templateName The template name to normalize.
* @return string The filename we need to look for.
*/
private function normalizeTemplateName($templateName)
{
if (strripos($templateName, '.twig')) {
return $templateName;
}
$phppos = strripos($templateName, '.php');
if ($phppos) {
$templateName = substr($templateName, 0, $phppos);
}
$tplpos = strripos($templateName, '.tpl');
if ($tplpos) {
$templateName = substr($templateName, 0, $tplpos);
}
return $templateName.'.twig';
}
/**
* Set up the places where twig can look for templates.
*
* @return \Twig_Loader_Filesystem The twig template loader or false if the template does not exist.
* @throws \Twig_Error_Loader In case a failure occurs.
*/
private function setupTwigTemplatepaths()
{
$filename = $this->normalizeTemplateName($this->template);
// get namespace if any
list($namespace, $filename) = $this->findModuleAndTemplateName($filename);
$this->twig_template = ($namespace !== null) ? '@'.$namespace.'/'.$filename : $filename;
$loader = new TemplateLoader();
$templateDirs = $this->findThemeTemplateDirs();
if ($this->module) {
$templateDirs[] = array($this->module => TemplateLoader::getModuleTemplateDir($this->module));
}
if ($this->theme['module']) {
try {
$templateDirs[] = array(
$this->theme['module'] => TemplateLoader::getModuleTemplateDir($this->theme['module'])
);
} catch (\InvalidArgumentException $e) {
// either the module is not enabled or it has no "templates" directory, ignore
}
}
// default, themeless templates are checked last
$templateDirs[] = array(
\Twig_Loader_Filesystem::MAIN_NAMESPACE => $this->configuration->resolvePath('templates')
);
foreach ($templateDirs as $entry) {
$loader->addPath($entry[key($entry)], key($entry));
}
return $loader;
}
/**
* Setup twig.
*/
private function setupTwig()
{
$auto_reload = $this->configuration->getBoolean('template.auto_reload', true);
$cache = $this->configuration->getString('template.cache', false);
// set up template paths
$loader = $this->setupTwigTemplatepaths();
// abort if twig template does not exist
if (!$loader->exists($this->twig_template)) {
return false;
}
// load extra i18n domains
if ($this->module) {
$this->localization->addModuleDomain($this->module);
}
if ($this->theme['module'] !== null && $this->theme['module'] !== $this->module) {
$this->localization->addModuleDomain($this->theme['module']);
}
$options = array(
'cache' => $cache,
'auto_reload' => $auto_reload,
'translation_function' => array('\SimpleSAML\Locale\Translate', 'translateSingularNativeGettext'),
'translation_function_plural' => array('\SimpleSAML\Locale\Translate', 'translatePluralNativeGettext'),
);
// set up translation
if ($this->localization->i18nBackend === \SimpleSAML\Locale\Localization::GETTEXT_I18N_BACKEND) {
$options['translation_function'] = array('\SimpleSAML\Locale\Translate', 'translateSingularGettext');
$options['translation_function_plural'] = array(
'\SimpleSAML\Locale\Translate',
'translatePluralGettext'
);
} // TODO: add a branch for the old SimpleSAMLphp backend
$twig = new Twig_Environment($loader, $options);
$twig->addExtension(new Twig_Extensions_Extension_I18n());
// initialize some basic context
$langParam = $this->configuration->getString('language.parameter.name', 'language');
$twig->addGlobal('languageParameterName', $langParam);
$twig->addGlobal('localeBackend', $this->configuration->getString('language.i18n.backend', 'SimpleSAMLphp'));
$twig->addGlobal('currentLanguage', $this->translator->getLanguage()->getLanguage());
$twig->addGlobal('isRTL', false); // language RTL configuration
if ($this->translator->getLanguage()->isLanguageRTL()) {
$twig->addGlobal('isRTL', true);
}
$queryParams = $_GET; // add query parameters, in case we need them in the template
if (isset($queryParams[$langParam])) {
unset($queryParams[$langParam]);
}
$twig->addGlobal('queryParams', $queryParams);
$twig->addGlobal('templateId', str_replace('.twig', '', $this->normalizeTemplateName($this->template)));
$twig->addGlobal('isProduction', $this->configuration->getBoolean('production', true));
// add a filter for translations out of arrays
$twig->addFilter(
new \Twig_SimpleFilter(
'translateFromArray',
array('\SimpleSAML\Locale\Translate', 'translateFromArray'),
array('needs_context' => true)
)
);
if ($this->controller) {
$this->controller->setUpTwig($twig);
}
return $twig;
}
/**
* Add overriding templates from the configured theme.
*
* @return array An array of module => templatedir lookups.
*/
private function findThemeTemplateDirs()
{
if ($this->theme['module'] === null) { // no module involved
return array();
}
// setup directories & namespaces
$themeDir = \SimpleSAML\Module::getModuleDir($this->theme['module']).'/themes/'.$this->theme['name'];
$subdirs = scandir($themeDir);
if (empty($subdirs)) { // no subdirectories in the theme directory, nothing to do here
// this is probably wrong, log a message
\SimpleSAML\Logger::warning('Empty theme directory for theme "'.$this->theme['name'].'".');
return array();
}
$themeTemplateDirs = array();
foreach ($subdirs as $entry) {
// discard anything that's not a directory. Expression is negated to profit from lazy evaluation
if (!($entry !== '.' && $entry !== '..' && is_dir($themeDir.'/'.$entry))) {
continue;
}
// set correct name for the default namespace
$ns = ($entry === 'default') ? \Twig_Loader_Filesystem::MAIN_NAMESPACE : $entry;
$themeTemplateDirs[] = array($ns => $themeDir.'/'.$entry);
}
return $themeTemplateDirs;
}
/**
* Get the template directory of a module, if it exists.
*
* @return string The templates directory of a module
*
* @throws \InvalidArgumentException If the module is not enabled or it has no templates directory.
*/
private function getModuleTemplateDir($module)
{
if (!\SimpleSAML\Module::isModuleEnabled($module)) {
throw new \InvalidArgumentException('The module \''.$module.'\' is not enabled.');
}
$moduledir = \SimpleSAML\Module::getModuleDir($module);
// check if module has a /templates dir, if so, append
$templatedir = $moduledir.'/templates';
if (!is_dir($templatedir)) {
throw new \InvalidArgumentException('The module \''.$module.'\' has no templates directory.');
}
return $templatedir;
}
/**
* Add the templates from a given module.
*
* Note that the module must be installed, enabled, and contain a "templates" directory.
*
* @param string $module The module where we need to search for templates.
*
* @throws \InvalidArgumentException If the module is not enabled or it has no templates directory.
*/
public function addTemplatesFromModule($module)
{
$dir = TemplateLoader::getModuleTemplateDir($module);
/** @var \Twig_Loader_Filesystem $loader */
$loader = $this->twig->getLoader();
$loader->addPath($dir, $module);
}
/**
* Generate an array for its use in the language bar, indexed by the ISO 639-2 codes of the languages available,
* containing their localized names and the URL that should be used in order to change to that language.
*
* @return array The array containing information of all available languages.
*/
private function generateLanguageBar()
{
$languages = $this->translator->getLanguage()->getLanguageList();
ksort($languages);
$langmap = null;
if (count($languages) > 1) {
$parameterName = $this->getTranslator()->getLanguage()->getLanguageParameterName();
$langmap = array();
foreach ($languages as $lang => $current) {
$lang = strtolower($lang);
$langname = $this->translator->getLanguage()->getLanguageLocalizedName($lang);
$url = false;
if (!$current) {
$url = htmlspecialchars(\SimpleSAML\Utils\HTTP::addURLParameters(
'',
array($parameterName => $lang)
));
}
$langmap[$lang] = array(
'name' => $langname,
'url' => $url,
);
}
}
return $langmap;
}
/**
* Set some default context
*/
private function twigDefaultContext()
{
// show language bar by default
if (!isset($this->data['hideLanguageBar'])) {
$this->data['hideLanguageBar'] = false;
}
// get languagebar
$this->data['languageBar'] = null;
if ($this->data['hideLanguageBar'] === false) {
$languageBar = $this->generateLanguageBar();
if (is_null($languageBar)) {
$this->data['hideLanguageBar'] = true;
} else {
$this->data['languageBar'] = $languageBar;
}
}
// assure that there is a <title> and <h1>
if (isset($this->data['header']) && !isset($this->data['pagetitle'])) {
$this->data['pagetitle'] = $this->data['header'];
}
if (!isset($this->data['pagetitle'])) {
$this->data['pagetitle'] = 'SimpleSAMLphp';
}
}
/**
* Show the template to the user.
*/
public function show()
{
if ($this->twig !== false) {
$this->twigDefaultContext();
if ($this->controller) {
$this->controller->display($this->data);
}
echo $this->twig->render($this->twig_template, $this->data);
} else {
$filename = $this->findTemplatePath($this->template);
require($filename);
}
}
/**
* Find module the template is in, if any
*
* @param string $template The relative path from the theme directory to the template file.
*
* @return array An array with the name of the module and template
*/
private function findModuleAndTemplateName($template)
{
$tmp = explode(':', $template, 2);
return (count($tmp) === 2) ? array($tmp[0], $tmp[1]) : array(null, $tmp[0]);
}
/**
* Find template path.
*
* This function locates the given template based on the template name. It will first search for the template in
* the current theme directory, and then the default theme.
*
* The template name may be on the form <module name>:<template path>, in which case it will search for the
* template file in the given module.
*
* @param string $template The relative path from the theme directory to the template file.
*
* @return string The absolute path to the template file.
*
* @throws \Exception If the template file couldn't be found.
*/
private function findTemplatePath($template, $throw_exception = true)
{
assert(is_string($template));
list($templateModule, $templateName) = $this->findModuleAndTemplateName($template);
$templateModule = ($templateModule !== null) ? $templateModule : 'default';
// first check the current theme
if ($this->theme['module'] !== null) {
// .../module/<themeModule>/themes/<themeName>/<templateModule>/<templateName>
$filename = \SimpleSAML\Module::getModuleDir($this->theme['module']).
'/themes/'.$this->theme['name'].'/'.$templateModule.'/'.$templateName;
} elseif ($templateModule !== 'default') {
// .../module/<templateModule>/templates/<templateName>
$filename = \SimpleSAML\Module::getModuleDir($templateModule).'/templates/'.$templateName;
} else {
// .../templates/<theme>/<templateName>
$filename = $this->configuration->getPathValue('templatedir', 'templates/').$templateName;
}
if (file_exists($filename)) {
return $filename;
}
// not found in current theme
\SimpleSAML\Logger::debug(
$_SERVER['PHP_SELF'].' - Template: Could not find template file ['.$template.'] at ['.
$filename.'] - now trying the base template'
);
// try default theme
if ($templateModule !== 'default') {
// .../module/<templateModule>/templates/<templateName>
$filename = \SimpleSAML\Module::getModuleDir($templateModule).'/templates/'.$templateName;
} else {
// .../templates/<templateName>
$filename = $this->configuration->getPathValue('templatedir', 'templates/').'/'.$templateName;
}
if (file_exists($filename)) {
return $filename;
}
// not found in default template
if ($throw_exception) {
// log error and throw exception
$error = 'Template: Could not find template file ['.$template.'] at ['.$filename.']';
\SimpleSAML\Logger::critical($_SERVER['PHP_SELF'].' - '.$error);
throw new \Exception($error);
} else {
// missing template expected, return NULL
return null;
}
}
/**
* Return the internal translator object used by this template.
*
* @return \SimpleSAML\Locale\Translate The translator that will be used with this template.
*/
public function getTranslator()
{
return $this->translator;
}
/**
* Get the current instance of Twig in use.
*
* @return false|Twig_Environment The Twig instance in use, or false if Twig is not used.
*/
public function getTwig()
{
return $this->twig;
}
/*
* Deprecated methods of this interface, all of them should go away.
*/
/**
* @param $name
*
* @return string
* @deprecated This method will be removed in SSP 2.0. Please use \SimpleSAML\Locale\Language::getLanguage()
* instead.
*/
public function getAttributeTranslation($name)
{
return $this->translator->getAttributeTranslation($name);
}
/**
* @return string
* @deprecated This method will be removed in SSP 2.0. Please use \SimpleSAML\Locale\Language::getLanguage()
* instead.
*/
public function getLanguage()
{
return $this->translator->getLanguage()->getLanguage();
}
/**
* @param $language
* @param bool $setLanguageCookie
*
* @deprecated This method will be removed in SSP 2.0. Please use \SimpleSAML\Locale\Language::setLanguage()
* instead.
*/
public function setLanguage($language, $setLanguageCookie = true)
{
$this->translator->getLanguage()->setLanguage($language, $setLanguageCookie);
}
/**
* @return null|string
* @deprecated This method will be removed in SSP 2.0. Please use \SimpleSAML\Locale\Language::getLanguageCookie()
* instead.
*/
public static function getLanguageCookie()
{
return \SimpleSAML\Locale\Language::getLanguageCookie();
}
/**
* @param $language
*
* @deprecated This method will be removed in SSP 2.0. Please use \SimpleSAML\Locale\Language::setLanguageCookie()
* instead.
*/
public static function setLanguageCookie($language)
{
\SimpleSAML\Locale\Language::setLanguageCookie($language);
}
/**
* Wraps Language->getLanguageList
*/
private function getLanguageList()
{
return $this->translator->getLanguage()->getLanguageList();
}
/**
* @param $tag
*
* @return array
* @deprecated This method will be removed in SSP 2.0. Please use \SimpleSAML\Locale\Translate::getTag() instead.
*/
public function getTag($tag)
{
return $this->translator->getTag($tag);
}
/**
* Temporary wrapper for \SimpleSAML\Locale\Translate::getPreferredTranslation().
*
* @deprecated This method will be removed in SSP 2.0. Please use
* \SimpleSAML\Locale\Translate::getPreferredTranslation() instead.
*/
public function getTranslation($translations)
{
return $this->translator->getPreferredTranslation($translations);
}
/**
* Includes a file relative to the template base directory.
* This function can be used to include headers and footers etc.
*
*/
private function includeAtTemplateBase($file)
{
$data = $this->data;
$filename = $this->findTemplatePath($file);
include($filename);
}
/**
* Wraps Translate->includeInlineTranslation()
*
* @see \SimpleSAML\Locale\Translate::includeInlineTranslation()
* @deprecated This method will be removed in SSP 2.0. Please use
* \SimpleSAML\Locale\Translate::includeInlineTranslation() instead.
*/
public function includeInlineTranslation($tag, $translation)
{
$this->translator->includeInlineTranslation($tag, $translation);
}
/**
* @param string $file
* @param \SimpleSAML\Configuration null $otherConfig
*
* @deprecated This method will be removed in SSP 2.0. Please use
* \SimpleSAML\Locale\Translate::includeLanguageFile() instead.
*/
public function includeLanguageFile($file, $otherConfig = null)
{
$this->translator->includeLanguageFile($file, $otherConfig);
}
/**
* Wrap Language->isLanguageRTL
*/
private function isLanguageRTL()
{
return $this->translator->getLanguage()->isLanguageRTL();
}
/**
* Merge two translation arrays.
*
* @param array $def The array holding string definitions.
* @param array $lang The array holding translations for every string.
*
* @return array The recursive merge of both arrays.
* @deprecated This method will be removed in SimpleSAMLphp 2.0. Please use array_merge_recursive() instead.
*/
public static function lang_merge($def, $lang)
{
foreach ($def as $key => $value) {
if (array_key_exists($key, $lang)) {
$def[$key] = array_merge($value, $lang[$key]);
}
}
return $def;
}
/**
* Behave like Language->noop to mark a tag for translation but actually do it later.
*
* @see \SimpleSAML\Locale\Translate::noop()
* @deprecated This method will be removed in SSP 2.0. Please use \SimpleSAML\Locale\Translate::noop() instead.
*/
public static function noop($tag)
{
return $tag;
}
/**
* Wrap Language->t to translate tag into the current language, with a fallback to english.
*
* @see \SimpleSAML\Locale\Translate::t()
* @deprecated This method will be removed in SSP 2.0. Please use \SimpleSAML\Locale\Translate::t() instead.
*/
public function t(
$tag,
$replacements = array(),
$fallbackdefault = true,
$oldreplacements = array(),
$striptags = false
) {
return $this->translator->t($tag, $replacements, $fallbackdefault, $oldreplacements, $striptags);
}
}